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UC2852 Fiches technique(PDF) 2 Page - Texas Instruments |
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UC2852 Fiches technique(HTML) 2 Page - Texas Instruments |
2 / 6 page SOIC–8 (TOP VIEW) D Package Unless otherwise stated, VCC=24V, ISET=50k Ω to GND, RAMP=1nF to GND, ISNS= –0.1V, VFB connected to COMP, no load on OUT, –55 °C<Ta<+125°C for the UC1852, –40 °C<Ta<+85°C for the UC2852, and 0°C<Ta<+70°C for the UC3852, and Ta=Tj. UC1852 UC2852 UC3852 ELECTRICAL CHARACTERISTICS ABSOLUTE MAXIMUM RATINGS Supply Voltage (Low-impedance Source)..........................30.0V Supply Current (High-impedance Source) ......................30.0mA OUT Current, Peak ............................................................. ±1.0A OUT Energy, Capacitive Load............................................ 5.0 µJ Input Voltage, ISNS ............................................................ ±5.0V Input Voltage, VFB............................................. –0.3V to +10.0V COMP Current ............................................................... ±10.0mA ISET Current..................................................................–10.0mA Power Dissipation at Ta ≤25°C (Note 3) ..............................1.0W Storage Temperature ....................................... –65 °C to +150°C Lead Temperature (Soldering, 10 Seconds) ................... +300 °C Note 1: All voltages with respect to GND (Pin 1). Note 2: All currents are positive into the specified terminal. Note 3: Refers to DIL-8 Package. Consult Packaging Section of Unitrode Integrated Circuits databook for thermal limitations and considerations of package. DIL–8 (TOP VIEW) J or N Package CONNECTION DIAGRAM PARAMETER TEST CONDITIONS MIN. TYP. MAX. UNITS Timer Section ISET Voltage 4.5 5.0 5.5 V RAMP Charge Current RAMP=2.5V 88 98 108 µA RAMP Discharge Current ISNS= –1.0V, RAMP=1.0V 12 28 50 mA RAMP Saturation Voltage ISNS= –1.0V, IRAMP=100 µA 0.006 0.200 V RAMP Threshold - Maximum Frequency VFB=10V, COMP open 0.92 1.02 1.12 V RAMP Threshold - PWM Comparator 3.9 4.3 4.8 V Current Sense Comparator ISNS Restart Threshold –18 –10 –4 mV ISNS Fault Threshold –550 –450 –350 mV ISNS Input Current –100 –30 100 µA Error Amplifier Section VFB Input Voltage 4.6 5.0 5.3 V VFB Input Bias Current –5.00 –0.03 5.00 µA COMP Sink Current COMP=7.5V 10 mA COMP Source Current COMP=2.5V –300 –175 –100 µA COMP Clamp Voltage VFB=0.0V, COMP open 9.2 10.0 10.6 V OUT Output OUT Saturation Voltage High VCC=13V, IOUT= –200mA, RAMP=2V 0.5 1.7 2.5 V OUT Saturation Voltage Low IOUT=200mA, ISNS= –1.0V 0.5 1.6 2.2 V OUT Saturation Voltage Low @ 10mA IOUT=10mA, ISNS= –1.0V 0.05 0.40 V OUT Clamp Voltage IOUT= –200mA, RAMP=2V 10.0 12.0 14.5 V OUT Voltage during UVLO IOUT=100mA, VCC=0V 0.5 1.0 2.2 V Overall Section Inactive Supply Current VCC=10V 0.2 0.4 1.0 mA Active Supply Current 3.0 6.0 10.0 mA VCC Clamp Voltage ICC=25mA 30 33 36 V VCC Turn-On Threshold 14.5 16.3 17.5 V VCC Turn-Off Threshold 10.5 11.5 13.0 V VCC Threshold Hysteresis 3 5 7 V UDG-92002 2 |
Numéro de pièce similaire - UC2852 |
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Description similaire - UC2852 |
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